Investigating the disk-corona relation in a blue AGN sample

doi:10.1088/1674-4527/9/9/003

YNAO OpenIR > 高能天体物理研究组

	Investigating the disk-corona relation in a blue AGN sample
	Liu JY(刘杰英)1,2 ; Liu BF(刘碧芳)1 ; Liu, JY (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2009-09
卷号	9 期号:9 页码:966-978
DOI	10.1088/1674-4527/9/9/003
产权排序	第1完成单位
收录类别	SCI
关键词	Accretion: Accretion Disks Galaxies: Active X-rays: Galaxies
摘要	We compile a blue AGN sample from SDSS and investigate how the ratio of hard X-ray to bolometric luminosity depends on the Eddington ratio and black hole mass. Our sample comprises 240 radio-quiet Seyfert 1 galaxies and QSOs. We find that the fraction of hard X-ray luminosity (log(L2-10keV/L-bol)) decreases with an increase of the Eddington ratio. We also find that the fraction of hard X-ray luminosity is independent of the black hole mass for radio-quiet AGNs. The relation of log(L2-10kev/L-bol) decreasing with increasing Eddington ratio indicates that X-ray bolometric correction is not a constant, from a larger sample supporting the results of Vasudevan & Fabian. We interpret our results by the disk corona evaporation/condensation model. In the frame work of this model, Compton cooling becomes efficient in cooling the corona at high accretion rates (in units of Eddington rate), leading to condensation of coronal gas to the disk. Consequently, the relative strength of the corona to the disk becomes weaker at higher Eddington ratios. Therefore, the fraction of hard X-ray emission to disk emission and hence to the bolometric emission is smaller at higher Eddington ratios. The independence of the fraction of hard X-ray luminosity with respect to the mass of the black hole can also be explained by the disk corona model since the coronal structure and luminosity (in units of Eddington luminosity) are independent of the mass of black holes.
项目资助者	National Natural Science Foundation of China [10533050, 10773028] ; National Basic Research Program of China-973 Program [2009CB824800]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1674-4527
URL	查看原文
归档日期	2009-09-16
WOS记录号	WOS:000270404200003
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; X-RAY-SPECTRA ; ADVECTION-DOMINATED ACCRETION ; RECONNECTION-HEATED CORONA ; BLACK-HOLE MASSES ; INNER COOL DISKS ; ENERGY-DISTRIBUTIONS ; THIN DISK ; MODEL ; FLOW
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4978
专题	高能天体物理研究组
通讯作者	Liu, JY (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Liu JY,Liu BF,Liu, JY . Investigating the disk-corona relation in a blue AGN sample[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(9):966-978.
APA	Liu JY,Liu BF,&Liu, JY .(2009).Investigating the disk-corona relation in a blue AGN sample.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(9),966-978.
MLA	Liu JY,et al."Investigating the disk-corona relation in a blue AGN sample".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.9(2009):966-978.

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